{
  "manageEntity": {
    "action": "Save",
    "entityId": "437236760",
    "entityType": "Track",
    "nonce": "0xf574eeecb4146ca4a6c762717576c21d04082d8348e6ae06185f42b56bfdaa09",
    "signature": "0x16beaa5bfa3fcc38f059e4b1b7f7399ebdfbd53645fce2db706fa2415446723c1e9d9869db3cb5685440e8ec0d5ddf6594b9f741baa2b724438827f48a39c4671c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}